A person who is nasty in their appearance, mannerisms, barely intelligible utterances, personal hygiene and/or behaviors who is also a boorish asshole, yet is either unaware or unconcerned of the unpleasant effect they have on those around them; for example, Ted Nugent.

Person A: Would you please give me an apple.
Person B: Sure.
Person A: Hey, man, did you just spit on my apple before polishing it on the seat of your shit-stained pants?

Person B: Yeah, so what's your point? (takes large bite of apple)
Person A: You are a complete Nasthole.